The hook up is in the same spot as it is on your 15. It's in the bag right up by the steering post.
Did anyone else have problems with getting there tether to work properly though? It seems like the plastic on the axys is thicker than on the pro so like the rubber thing doesn't push the button down far enough? If you don't push down on the rubber piece the motor cuts in and out. I've installed a bunch on pros and never had an issue.